Oltásútlevél 2018July 23, 2021https://esi.link/namXLdP2 https://web.archive.org/web/20210505182633/https://ec.europa.eu/health/sites/default/files/vaccination/docs/2019-2022_roadmap_en.pdf https://web.archive.org/web/20201212155636/https://www.healthparliament.eu/wp-content/uploads/2018/04/Knowledge-is-the-best-vaccine.pdf https://web.archive.org/web/20210725085726/https://www.vaccinestoday.eu/stories/eu-considers-vaccination-passport-for-kids/